Updated October 2026 · Audio basics for beginners
Sample rate is how many times per second the sound is measured, and bit depth is how precisely each measurement is stored. For speech, 44.1 or 48 kilohertz is enough, and 24-bit gives plenty of room for editing. Keep the settings your recording was made at, and avoid converting without a reason.
Two numbers appear in almost every audio file, and beginners often mix them up. The sample rate and the bit depth both describe how a digital recording is stored, but they measure different things. Understanding the difference helps you choose settings with confidence, and it stops you from doing unnecessary conversions that add no quality.
This post explains each number with an analogy, shows what they mean for speech and music, and sets out the simple rules most creators need. The aim is not technical depth but a clear decision.
Sound is a continuous wave, and a digital recording captures it by taking a series of measurements, called samples. The sample rate is how many of those measurements are taken each second. A rate of 44,100 samples per second means the wave is measured 44,100 times every second. A higher rate can capture higher frequencies, which is why the rate matters for the range of sound a recording holds.
Think of it like taking photographs of a moving object. More frames per second show faster movement more accurately. The sample rate sets how fast the sound can be followed.
Each sample is a number, and the bit depth is the number of bits used to store it. More bits allow a finer range of values, so the difference between a quiet sound and a slightly louder one can be captured more precisely. A 16-bit recording has 65,536 possible values for each sample, and a 24-bit recording has far more.
In everyday terms, bit depth sets the dynamic range and the amount of room you have to work with. A 24-bit recording leaves more space below the quiet parts and above the loud ones, which helps when you edit or change the level.
For speech, the sample rate of 44.1 or 48 kilohertz is more than enough to capture the voice clearly. Higher rates capture frequencies that the human voice does not produce in a useful way for most listeners. Bit depth matters more during recording and editing, because it gives you headroom to work with, so 24-bit is a sensible choice for a master.
The final delivery is often 16-bit or a compressed format, because that is what many platforms accept. The master can stay at 24-bit, and you can export a smaller version for delivery.
Music often has more high-frequency content, such as cymbals and some synthesisers, so a higher sample rate is sometimes chosen. Many producers record at 48 kilohertz or higher, and some use higher rates for specific processing. The bit depth matters for the same reason as with speech: headroom during mixing. A 24-bit master is common, with delivery formats chosen for each platform.
Changing the sample rate after recording is called resampling, and it adds a conversion step. Each conversion can change the sound slightly, so avoid it unless a platform or a collaborator requires it. Keep the rate at which you recorded, and change it only in the final export if needed.
Many beginners think a higher number always means better sound. That is not true for speech, where the difference between 44.1 and 96 kilohertz is hard to hear on most devices. Another confusion is between bit depth and loudness. Bit depth does not make a recording louder; it changes how finely the level is stored.
Editing software works on the sample rate of the project, and the rate you choose at the start affects how the file behaves during processing. A plug-in that resamples internally may add a small conversion step, which is why keeping the project and the recording at the same rate is a good habit. If you mix material recorded at different rates, convert it once, deliberately, at the start of the project, rather than letting each track convert on its own.
When a collaborator sends a file at a different rate, check it before you begin. Mismatched rates are a common cause of pitch shifts and crackles that look like a fault in the recording but are really a setup problem.
These rules describe common practice, and the best choices depend on the project, the platform and the equipment. Some specialist work uses higher rates for specific reasons. For most speech and everyday music, the rules above will serve well.
After export, check the file in a player and on a phone to confirm it is what you intended. The Vocal Checker shows clipping, noise and level problems in a recording you own. The Tunedzy Go page covers cleaning a phone recording. For the basics that come before this, read the beginner basics post in this series.
Spot clipping, noise, rumble and level problems. Runs in your browser, nothing is uploaded.
Yes, for most speech and many music jobs. 48 kilohertz is also common and fine.
For a master that will be edited, yes, because it gives more headroom. Delivery files are often 16-bit.
Not usually. A higher rate adds file size without a clear benefit for speech.
No. It changes how finely the level is stored, not how loud it sounds.
